About us

P.L. Berry & Associates has been providing Patent Attorney services from Christchurch, New Zealand’s second largest city, since 1956. We serve clients throughout the South Island, throughout the country, and throughout the world.

All our professional staff provide a full range of intellectual property advice, to help each of our clients choose a cost-effective IP strategy based on their own particular needs, whatever they may be.

Elspeth Buchanan


B.Met. (Hons), C.Eng., MIMMM, FNZIPA
Registered Patent Attorney, New Zealand and Australia

Elspeth graduated from the University of Sheffield with an Honours degree in Metallurgy, and is a Member of the Institute of Materials, Minerals & Mining. She is a Chartered Engineer, and has agricultural experience including farm management, livestock handling and cropping.

Elspeth has owned P L Berry & Associates since 1977, having originally trained in the UK. The experience of over 40 years in IP provides insight into all available options, as well as specialist skills in licensing and portfolio management.

Elspeth was selected by Thomson Reuters to write their New Zealand Trademarks Precedents and New Zealand Patents Precedents publications, how-to guides to assist practitioners in all steps of the trademark and patent protection processes.  She is a regular guest lecturer on IP in the Engineering Faculty at Canterbury University, and has provided many industry seminars at the request of specific organisations.

Alan Chadwick

Senior Associate

B.E. (Chem. & Proc.), FNZIPA
Registered Patent Attorney, New Zealand and Australia

Alan has a degree in Chemical and Process Engineering from Canterbury University, and a wide range of practical industry experience, including manufacture of printed circuit boards and plastic films, industrial water treatment and in the energy industry. As well as this technical expertise, he has worked in project management, sales and business management. He has a practical interest in computing hardware and software, and experience in IT management.

For over a decade, Alan has assisted his local clients in devising and implementing IP protection strategies, including obtaining New Zealand and international patent protection and trademark registrations. His practice covers a range of industries including software firms, wine growers, and heavy industrial equipment. He is also entrusted with New Zealand protection of pharmaceuticals by several large overseas producers.

Details of Professional Technical Competency

As required by the Code of Conduct for Patent and Trade Mark Attorneys, further details of the individual experience and competencies of each of our professional staff can be downloaded below.

Professional Staff Profiles and Competencies (PDF, 266kB)